Electrically-welded tube and flange-plate.



T. E. MURRAY. ELECTRICALLY WELDED TUBE AND FLANCK PLATE.

APPLICATION FILED NOV. 29, 1915- Patented Feb. 13, 1917.

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ELECTBICALLY-WELDED rum: AND nan sin-nus.

To. all whom it may concern:

Be it known that I, Tirol/us E. MURRAY, a citizen of the United States, residing at New York, in the county vof New York and State of New York, have invented a certain new ,and useful Improvement in Electrically' Welded Tubes and Flange-Plates, of which the following is a specification.

The invention relates to an electrically welded tube and flange plate, and consists in the construction whereby the end of the tube is received in a socket on said" flange plate and welded to said plate at its butt end, and also in the means for increasing the area of the welded joint, and for locking said joint by, the metal extruded during t e welding operation;

. The accompanyiri drawing is a longitudinal section of a tu e and a flange plate to be welded thereon, the said tube and plate being shown in position in the electrodes of a we din machine.

.A is t e tube, to theend of which the flange (plate B is to be electrically welded.

. On sai' plate is a preferablyintegral sleeve G, in which the tube A fits. The sleeve G thus forms a'socket for the end of the tube, in which socket is a shoulder, here in the form of a circular rib D, which registers with the butt end of the tube. Said ribis here produced by the circular recess E in the flange plate B, other ways.

Theweldi structedf as fo lows." The flungeplate' is seated in a shoulder formed In a. central projection on the annular electrodeG,

. the source of welding current. plate H connected to the other terminal-1s secured. to electrode G by bolts J. Said bolts are insulated from electrode G and plate H, and said electrode and said plate are insulated from one another in any suitable Wag, I I

.A tu ular .electrode K, formed in two longitudinally divided 'half' sections, as shown in dotted lines, is placed in the central openings in plate and electrode G. On one end of said electrode is a'flange L, which bears against plate H, and on the other end is a flange M, which enters the Specification of Letters Patent.

- between flange L and sleeve C.

but I maymake itin.

the shoulder i1 said socket.

electrodes a re preferablycom which is connected to one terminal of the lead from An annular- Patented Feb. 13, 1917.

Application filed November 29, 1918. Serial No. [84,007.

tube A. The opening in electrode K is tr, per-ed and receives a tapered mandrel N which, on being driven in, causes said seel8 tions to separate and the electrode to expand, so that ths tube wall is tightly clamped When the welding current is established, the end of tube A and the rib D are welded together. The recess E receives the fluid metal, or a substantial part of it, extruded at the joint. so t rat the recess surfaces, and thcouter surfa re of the tube covered by said recess, are adred to the normal joint sur- 65.; faces to increase the welded area, and also a locking joint in formed by the metal entering said recess so that the whole resulting joint is exceed ugly strong.

'Theelectroccs are made of any suitable metal. prefera ly copper. The sleeve-C is to be insulated from the tube A by ariy'suitable material applied in fluid condition-as a coating to tie tube or to the interior of the sleeve.

I claim: A

1. A tube. a flange plate having an open ing registering with the bore of saidftu and a sleeve on said plate receiving sai tube; the end of said tube being welded to said flange pl: tel,

2. A tube, and a flange plate having-8J1, internally shculdered socket receiving said tube; the end of said tube being welded to 3. A tube. 5 flange plate having an open ing registering with the bore ofsaid tube, and 'a circular rib on said plate surrounding said opening: the end of said tube being weldedtosaic. rib.

4. A tube, fian 0 ing registering wit t I and,a sleeve on said late receiving said tube; the end of said tu within said sleeve being welded to said flange plate, and there being an 90 late having an open-' shore of said tube internal circular recess in said flange plate and sleeve surroundin the joint between said tube end'and said ate.

5. A tube, a flange plate wel ed to said tube, and mes as for oc ing said tube to said plate by molten metal extruded from the welded joint between-said tube and said plate.

6. A tube, a flange plate welded to the l in its inner periphery a cavity in proximity t0 the jpmt between said tube and said Witnesses:

bqflalifel plate-91 receiving molten metal ex-, GERTRUDE T. Ponmn,

- tru frbin' 'saiijd joint. MAY-T. MCGARRY.

and plate receiving said tubgfand having slgnature in presence of two witnesses.

THOMAS E. MURRAY.

en d qf -s aid tube, and etubular brojection-oii In testimony whereof I have aflixed my 

